Spirit-level.



No. 885,:'162A`4 'PATENTBD APR. 2s, 190s.

` `M, KLBINBAUBR.

SPIRIT LEVEL. 44171,110411011-rltaumsnmr.13. 1907'.

wavmum l I vUNTTED I sTATEs PATENT oEEioE.

MATHIAS KLELNBAUER, OF CHICAGO, ILLINOIS.

SPIRIT-LEVEL.

` To all whom it may concern: i

Vao

vBe it known that I, MATHIAs KLEINBAUER, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in S irit-Levels, of which the following is a speci cation.

This invention relates to spirit levels and has for its object to rovide improved means for supporting theg asses and for adjusting the same, as hereinafter more fully explained.

The invention is illustrated in the accompanying drawing, in which,

Figure 1 is a plan view thereof. Fig. 2 is an edge view of the plates, which hold the glasses in lace. F ig.V 3 is a section on the line3 3 o Fig. 1. l

The straight edge bar or beam ofthe spirit level is indicated at 1,-and a metal frame which holds four spirit glasses 3 is composed of opposite plates 5 and 6. These are preferab y square in form and have a circular opening at the center around which is an inwardly projecting annular flange or shoulder 7. These plates fit in suitable rabbets formed on opposite sides of the bar 1 and they are fastened together by means of screws 11 which extend through holes in the corners of the plate 6 and into taps in the ends of posts 9 projecting across from the inner side of the plate 5. These p'osts serve to space the plates apart, and also receive the screws as stated. The four glasses 3 are arranged to form a square and are held within acircular casting 13 which fits between the shoulders 7 on the face plates. This casting is circular at its outer edge, but it has av central opening which is squared and which is cut away on each side to` exhibit the bubble of the spirit levels. The annular casting 13 is provided on each side with opposite segmental lugs or projections 14 which fit within the circular openings in the face plates. The short segments 14 are advanta eous as com ared with a full ring, since a fu l ring woul not iit as accurately to the circular holes in the plates 5 and 6 as the segments or lugs as shown, and the adjustment would be more difficult. Diagonal cross bars 17 extend between the cor- Specification of Letters Patent.' j

Application filed September 12, 1907.

Patented April 28, 1908.

Serial No. 392,506.

ners of the squarey formed in the casting 13 and at the center support a socket 15 which is adapted to receive a key whereby the casting may be turned to adjustment. v

The manner of adjustment is as follows By loosening the screws 11 the plates 5 and 6 will be loosened and the central casting 13 which holds lthe glasses, can be turned freely between the shoulders 7, and when properly set or adjusted the screws will be tightened, and the shoulders 7 will press against the ring 13 and so hold the same in place. By placing a key in the socket 15 a very fine adjustment canbe obtained, particularly if the screws 11 are loosened only slightly, so that considerable friction will exist, which will prevent any slip'incident to looseness after the glasses-are once set.

' 1. In a spirit level, the combination of olpposite face plates having circular openings t i erein, means connected to the respective plates to draw the same together as a clamp,

- a ring clamped between the plates and capable of being turned to adjustment, and having lateral projections fitting within and against the edges of said openings, and a level glass carried by said ring.

2. In a spirit level, the combination4 of opposite face plates having circular o enings therein, screws connecting the p ates' to draw the same toward each other, a rotatable ring clamped between the plates and having-segmental projections fitting within said openings, to center the ring, and a level glass carried by said ring.

3. In a spirit level, the combination of o posite face plates, an annular holder c amped between said plates and having a socket supported at the center and adapted to receive a key to turn said holder, and a level glass carried by said holder.

In testimony whereof I affix my signature, in presence of two witnesses.

MATHIAS KLEIN BAUER.

Vlitnesses:l

W. J. ROBINSON,

NELLIE FELTsKoG. 

